Knife-sharp



G. MAURER.

KNIFE SHARPENER.

APPLICATION FILED DEC-8, um.

Patent ed Dec. 9,1919.

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enemas Mavens, orfonloeeo, rumors;

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To allwhom it may concern; I

Bait known that I, GEORGE MAURER, a subject of the King of Hungary, (andWho has taken out his first papers for citizenship in the UnitedStates,) residing at Chicago, in

the county of Cook, and State of Illinois,

have invented a new and useful Improvement in Knife-Sharpeners, of whichthe following is a specification. a

My invention relates more particularly to knife-Sharpeners provided of aform adapting them to be carried inthe pocket 'of a garment, as forexample by waiters or.

. others using knives, though certain features which it is adapted to becarried-aboutin thereof maybe incorporatedin-a device'intended to besupported. on a table or wall,

' My objects are to'provide anovel, simple, and economical constructionof knife-sharpener, preferably in a form to be carried about in thepocket of a userand by which a knife maybe quickly sharpened to presentthe desired fineness of edge and in which the bodies of abrasive orcutting material provided may be quickly removed and replaced atwillp LReferring to Figure'lfis a face view of -my improved knife-sharpenershowing it as completely opened up to disclose; details ofconstruction,- the position shown being one not assumed by the'device'in use, and with the means for restraining the opening of thedevice, disconnected. Fig. 2 is a top view of the device showing it inoperative-position but with certain parts shown in disconnectedcondition. Figs. 3 and 4 are sections taken at the broken lines '3'3 andH, respectively, on Fig. 2 and viewed in the direction of the arrows;and Fig; 5, an end view of'the device in 'folded' condition in thepocket or a garment,

. The device comprises a casing constructed of a pair of hollow,preferablysubstantially rectangular members 5 and 6, which may be ofmetal, and side sections 5 and 6. The members 5 audit are hingedlyconnectedtogether' on the pintle 8=whichpasses-through ears 9'on thesections 5.-an d 6, acoiled spring 10 surrounding the" 'pin'tle betweenthese ears and. hearing at its "opposite-feuds 11 against the'innerfaces of the section's'5'and 6, operating toswing the sections 5 and '6in a direction away from each 'other'ontheir hinge connection'. The Qopposite "sides of the sections'5 and- 6 are equippedw'i'th theSpecification of Letters Patent.

the accompanying drawing,

iPatented Dec. 9, 1919.

Application filed December s; ieri. serial'no. 206,261.--

sections 5v and 6 which complete the 010 sure, these sections beingsecured to the see tions 5-and 6'by squared removable and replaceablepins-7 which passthrough ears '12 and 12 on these sections, the openingsin these ears being square to prevent rotation Secured to, and locatedinthe interior of, the sectlons 5' and 6 are a series of knife- "sharpening'sections 13 to 16 inclusive, each series being shown asformed offour ofthe 6 together and the knife-sharpening sectlons of one 'serlesthereof "are staggered relative to the knife-sharpening sections of theother series-thereof, as shown in the drawings; The knife-sharpeningsections referred to of each series range from one producing a relativecoarse c'u-tto' one which produces a relative finesmoothening cut withthe othersjgraduated in between, those [of-the knife-sharpeningsectionshearin similar numerals, producing thesame degree of abrading orsharpening action on the kni'fe. By preference the knife-sharpeningsections '16-still' finer sharpening stones to producethe desiredsmoothness'of edge onthe knife, f

The knife-sharpening sections are held in place in the covers Band 6 byengagement at dove-tailedportions 17 thereof with'pairs of inclinedflanges 18uformed on the strips .19 secured to the inner faces of thecover sections 5 and 6 asby soldering them thereto, this feature of theconstruction permitting the knife-sharpening sections-t0 be readily,

of the sections 5 and 6 on the carrying sections 5 and 6. r

- tions 13 would be steels of a character com- 'monly used in *thesharpening of carving "knives, the sections 14 would be relativelycoarse sharpening stones, the sections 15 reli 'atively finer sharpeningstones, and the secslipped intoand out of the channels provided betweenthe pairs of flanges 18'and when in position thereinbe held firmly 1nthe desired position relativeto each other.

It is preferred that the surfaces of the'sec-- tions '14, 15, and 16with which the knife- "blade contacts in the sharpening'operation, berounded as shown, to augment the abrad ing or sharpeningnction, and:that the sec tions-13 which preferably extend a slight hand, introducesthe knife-blade distance, as for example 1/100 of an inch short of theplane in which the sharpening surfaces of the other sections extend, be

shown in Fig. '3, topresent a channel into which the knife-blade to besharpened is inserted, it being preferred that some restraining means,as for example the chain illustrated at 20 and connected with studs 21on the inner ,faces of the sections 5 and 6, be provided for preventingthe sections from swinging-an undue distance apart under the action ofthe spring 10.- The operator grasping the device with the hinge portionthereof lying in his palm and with the sections 13 extending adjacentthe thumb portion of 121s to e sharpened into the channel shownqat 22 inFig.3 and draws it toward him while maintaining the cutting edge of theblade in engagement with the knife-sharpening sections, itbeing'preferred that the operator in this drawing operation referred tograd- .ually press'the sections 5 and 6 toward each other, causing theknife-blade to rise in the channel 22 asitb'ecomes pr'ogressivelv shaLlower. 7

In the use of the device as preferably constructed as above stated, theoperator by varying the pressure exerted by him at the end of the casecontaining the sections 13 may bring these particular sections into andout of position for contacting with the knife-blade by reason of theflexibility of the case and thus may sharpen theblade on all of thesections, or only those other than the sections 13, asdesirec.

It will be noted thatthe portions of the knife-blade will be first actedon by therelatively coarse sharpening sections 13 when. in position toact on the knife, thence bythe next finer sections 1% and so onthroughout the series and thus the 'knife will be sharpened veryeffectually, causing it to present the desired finished edge.

When the device is out of use, theope a tor closes the sections 5 and 6together and fastens them in this position by the snapfastener :23 onthe section 6 engaging a I hook 24 on the section 5 To remove thesharpenin sections the operator withdraws vthe pins permitting thesections 5 and 6 to be removed and then slides the sharpening sectionsout of the grooves containing them.

What I claim as new and desire to secure by Letters Patent is" I 1. In aknife-sharpener, the combination of a plurality of series ofknife-sharpening surfaces arranged staggered relation and presenting a-V:shaped channel intowhich the -knife:-blade to be sharpened isinserted for contacting sai'dsur faces, the surfaces of said seriesbeing graduated from a relatlvely coarse sharpening surface to arelatively fine sharpening surface, whereby as r a knife-blade is drawnthrough said channel its cutting edge port-ion is progressively actedupon by the graduated knife-sharpening sin'fa'ces, first producingcoarse sharpen ing and finally relatively fine sharpening.

A lmife-sharpener comprising a casing formed of hingedly-connectedsections, a plurality of series of knife-sharpening ,surfaces in saidcasing arranged in staggered relation "i-th said surfaces angularlydisposed relative to the of said hinge and presenting a -V-shapedchannel into which the knife-blade to be sharpened is inserted forcontacting said surfaces,- said casing being open along one side forremoval and replacement of said surfaces therethrough, and a closure forsaid open side of the casing. I i r 3. A knifesharpener comprising acasing formed of hingedly connected sections, spring means tending toswing said sections apart, a plurality of series of lo life-sharpenlngsurfaces in said casing arranged in staggered relation withsaid surfacesangulerly disposed relative to the axes of said hinge and presenting avV-shaped channel into which the knife-blade to be sl-iarpenedis1nstarted for contacting said surfaces, said casformed ofhingedl'y-connected sections,

spring means tending to swing said sections apart, a plurallty of seriesof knife-sharpenin surfaces arran ed in sta ered relation (3 V 0 ba swithsaid surfacesengularly disposed rela' tive to theaxes of said hingeand presenting a V-shaped channel into which the knifebla'de tobe-sh'arpene'd is inserted for contacting said surfaces, said casingbeing open along one side for removal and. replacement of said surfacestherethrough, a closure for the open side of said casing, and releasablemeans engaging said closurefor holdmgtheparts of said casing includingsaid closure, inclosed position against the action of said spring means.

5. A knife-sharpener comprising a casing formed of hingedly-connectedsections, a plurality of series of knifesharpening surfaces in saidcasing arranged in staggered relation with said surfaces angularlydispos'edrela'tive to the axes of said hinge and presenting. a V-shapedchannel into which the knife-blade to be sharpened is inserted forcontacting said surfaces, said casing being open along onesi'de forremoval and re-.

placement of said surfaces therethrough,

and a closure for said open side of the casing formed of sections andmeans for releasably securing said sections to said hingedlyconnectedsections.

6. In a knife-sharpener, the combination of a plurality of series ofknife-sharpening surfaces arranged in staggered relation and presentinga V-shaped channel into which the knife-blade to be sharpened isinserted for contacting said surfaces, said surfaces at the portionsthereof contacted by the knife being of curved contour, the surfaces ofsaid series being graduated from a relatively coarse sharpeninsurface'to a relatively fine sharpening sur ace, whereby as a knifebladeis drawn through said channel its cutting edge portion is progressivelyacted upon by the graduated knife-sharpening surfaces, first producingcoarse'sharpening and finally relatively fine sharpening.

7. In a knife-sharpener, the combination of a plurality of series ofknife-sharpening surfaces arranged in staggered relation and presentinga V-shaped channel into which the knife-blade to be sharpened isinserted for contacting said surfaces, the surfaces of said series beinggraduated from a relatively coarse sharpening surface to a relativelyfine sharpening surface, and means supporting said surfaces, thecoarsest of said surfaces being inset from a plane in which theremainder of said surfaces extend, said means supporting said surfacesbeing constructed and arranged as to permit the operator at will toextend said coarse surfaces into ositionfor engaging with the blade asit is drawn through said channel;

8. In a knife-sharpener, the combination I I said series being graduatedfrom a relatively coarse sharpening surfaceto a relatively finesharpenmg surface, and means supporting said surfaces, the coarsest ofsaid surfaces a being inset from the plane in which the remainder ofsaid surfaces extend, said means supporting said surfaces beingconstructed and arranged as to permit the operator at willto extend saidcoarse surfaces into posi: tion for engaging with the-blade as it isdrawn through saidchannel, and the portions of said coarse sharpeningsurfaces adjacent the knife-blade being flat.

9. In a knife-sharpener, the combination of a casing formed ofhingedly-connected sections and knife-sharpening members on saidcasing-sections arranged in staggered relationand presentmg a V-shapedchannel,- when said casing is open into which the knife to be sharpenedis inserted for con- I tactin said sharpening members, means carrle bsaid sections to normally hold the same 111 open posltlon, sald casingforming a complete housin for said members.

enonon MAURER,

